When in doubt check the schematic. That clearly shows you must have a diode in series with the flipper EOS switch to fire the ball out. Note, this is different from the flipper coil EOS, there is a second low power switch that closes at EOS that tells the game the flipper is flipped and it can kick the ball out.
I do not see a special fuse for the drop target reset other than the 1A SB fuse for all the playfield coils.
To get the game in self test there should be a small red button inside the front door. First press is lamps, then a couple more presses to run through the coil test.

I recommend you get the manual and schematics if you havn't done so already.